Seed-drill hoe.



No. 669,664. Patented Mar. I2, 19m. T. B. RUWELL.

SEED DRILL HOE.

(Application filed Jan. 5, 1901.)

(No Model.)

UNITED STATES PATENT OFFICE.

THEODORE B. ROWELL, OF BEAVERDAM, WISCONSIN.

SEED-DRILL HOE.

SPECIFICATION forming part of Letters Patent No. 669,664, dated March 12, 1901.

Application filed January 5, 1901. Serial No. 42,165. \No model.)

. thereof.

My invention has for its object to simplify and cheapen the manufacture of seed-drill hoes as well as to provide for their ready yield to obstructions of more than ordinary resistance, said invention consisting in certain peculiarities of construction and combination of parts hereinafter particularly set forth with reference to the accompanying drawings and subsequently claimed.

Figure l of the drawings represents a side elevation of one of my improved seed-drill hoes, partly in section; Fig. 2, a plan view of a portion of the hoe, partly in horizontal section; and Fig. 3, a perspective view of abraceblock that constitutes a detail of my invention.

Referring by letter to the drawings, A indicates the hollow shank, and B the shoe, of a seed-drill hoe. Bolted to an upper forward ear I) of the hoeshank are forwardly-diverging metal brace-barsC, the other ends of these bars being in pivotal union with a hanger D, attachable to a seed-drill cross-beam. Made fast to the forward end of shoe B are other forwardly-divergin g metal brace-bars E, that are also in pivotal union with the hanger D, the construction and arrangement of parts thus far described constituting a type of seeddrill hoe to which my improvements are particularly applicable.

Bolted between the bars 0, about midway of their length, is a casting constituting what I term a brace-block, having rearwardlyextending bar-opposing side wings c, that are provided with upper and lower outer flanges d, arranged to lap the corresponding edges of said bars. A transverse front portion 6 of the brace-block is provided with an upper,cen tral, and vertically disposed slot f,engaged by a rod F, that has its rear end in the form of a hook engaged by a pintle g between a pair of ears h, extending at right angles to an arm Gr, said pintle, ears, and arm being preferably a single casting constituting a bell-crank thatis fulcru med on the bolt t', that engages the brace-bars O and said brace-block. The arm G of the bell-crank is considerably longer than the pintle-connected ears integral therewith, the rear end of this arm being forked and pivotally connected to a link bar H, that extends up between the brace-bars O to have pivotal union with a crank such as is common in seed-drills, provision being had for varying the working throw of said link bar.

The forward end of rod F is shown provided with a stop in the form of a nut I, the latter being run on said rod against a preferably flanged washer J, between which and the front e of the brace-block is arranged a spiral spring K (if suitable power, the tension of this spring being regulated by adjustment of said nut.

By depressing arm G of the aforesaid bellcrank there is pull on rod F and corresponding pivotal swing of the hoe to increase the depth of cut on the part of its shoe; but the construction and arrangement of parts herein shown and described are obviously such that there will be ready yield of the entire hoe in case said shoe meets with an obstruction of more than ordinary resistance. It is also to be observed that provision is had for long sweep of the hoe in proportion to resulting compression of spring K over normal tension. Hence the action is very easy on said spring, and it is obvious that said hoe may be readily lifted to bring the shoe portion thereof out of working position without detriment to the spring mechanism.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination of the hoe-shank and shoe in union with rear ends of bars having their forward ends in pivotal connection with a hanger, a rigid block intermediate of the uppermost bars, a rod extending rearward through a play-slot in the block, a spiral spring held on the rod forward of said block, and a bell-crank in connection with the rear end of the said rod.

2. The combination of the hoe-shank and shoe in union with rear ends of bars having their forward ends in pivotal connection with a hanger, a rigid block intermediate of the uppermost bars, a rod extending rearward ward through a play-slot in the block, a spiral spring held on; the rod forward of said block, and a bell-crank on the aforesaid bolt in connection with the rear end of said rod.

In testimony that I claim the foregoing I have hereunto set my hand, at Beaverdam,

in the county of Dodge and State of Wiscon- 2o sin, in the presence of two witnesses.

THEODORE B. ROWELL.

Witnesses:

W. H. STACY, E. D. STACY. 

